Yep, sizing and lubing in one step is best done (only way?) with a lubersizer. RCBS and Lyman are prolly the most common, fllowed by Star and Saeco But they are not perfect; some are hard to adjust and some leak.
Pan lubing and tumble lubing are only as messy as you are, and I don't have any problems there. I have avoided getting a lubersizer because tumble lubing and pan lubing have served my purposes for over 12 years shooting cast bullets in my 38/357, .44 Mag. & Spec., and 45 ACP. When I find a bullet/lube combo (which is much easier pan lubing) I usually lube up 100 to 200 at a time, and a lot of times I'll stock pile a particular bullet lubed with a particular lube. Some lubes allow you to "punch" the bullets out of the lube cake some lubes are "stickier" and take a bit longer 'cause you have to cut them out of the cake. Either way it isn't a "chore" to pan lube. Tumble lubing is so quick and simple it hardly needs explaination. I just put 100 or so bullets in a container, squirt a bit of thinned alox or 45/45/10 in, and swirl. I like to stand bullets on end to allow the lube to run off the nose and get a more even coating, but many eliminate this step and pour them out on a piece of waxed paper. Any sizing I need to do is easily done with my Lee dies (two standard and two "custom"). Piece 'o cake and been working for me fer years...